Art and machine for working paper



July 26, 1938. D. M. MCBEAN ART AND MACHINE FOR WORKING PAPER lllllll 6 Shoets--Shee'rl l Original Filed Feb. 1, 1933 INVENTOR @006046 /V/VCEA/v BY ZM @2549@ v.Aromn-:YS

July 26, 1938. D. M. MGBEAN ART AND MACHINE FOR WORKING PAPER 1955 6 Sheets-Sheet 2 Original Filed Feb. 1

July 26, l1938. D. M. Mc-BEAN 2,124,582

ART AND MACHINE Fon WORKING PAPER Uriginal Filed Feb. l; 1933 6 Sheets-Sheet' July 26, 1938. D, M, MCBEAN v2,124,582

ART AND MACHINE FOR WORKING PAPER original Filed Feb. 1, 1953 e sheets-sheet 4 INVENTOR f ATTORNEY-S July 26, 1938. D. M. MCBEAN AT AND MACHINE FOR WORKING PAPER Original Filed Feb. 1, 1933 6.Sheets-Shet 5 July 26, 1938. D. M. MCBEAN ART AND MACHINE FOR WORKING PAPER Original Filed Feb. l, 1935 6 Sheets-Sheel 6 Q (A INVENTOR a//ams /7 c55/W WH/ ATTORNEYS Patented July 26, 1938 ART AND MACHINE FOR WORKING PAPER Douglas McBean; Canajoharie, N. Y., assignor,

by mesne assignments,

to The Paper Service Company, 'LocklancL Ohio, a corporation of Ohio Application February 1, 1933, Serial No. 654,588 Renewed October 18, 1937 12 Claims.

'This invention relates to the production of paper and particularly to the production of twoway stretchable paper which may be used for various purposes, such for `example as a lining for large sugar bags and other containers.

One object of the invention is a novel method and means for producing a paper of this lcharacter. A further object of the invention is a novel and improved machine for crinkling the paper stock in one direction, forming a multiplicity of longitudinal laterally yielding folds at right angles to the crinklesand preparing the same ready for use for linings of sugar bags and the like and other purposes. A further object of the invention is a paper particularly adapted for the above indicated purposes which is characterized by its freely stretchable character both laterally and longitudinally and by a pronounced degree of stretchability inone of these directions with the paper unimpaired. Further objects of the invention will hereinafter appear.

For a better understanding of the invention reference may be had to the accompanying drawings illustrating one embodiment thereof where- Fig. 1 is a diagrammatic view of a machine with certain parts broken away embodying the invention;

Fig. 2 is a detail of a part of the drive mechanism;

Fig. 3 is a view of certain parts broken away of another part of the drive mechanism;

Fig. 4 is a side View partly in section on the line 4-4 of Fig. 3 of another part of the drive mechanism;

Fig. 5 is a sectional view with certain parts in elevation through a part of the machine;

Fig. 6 is a front View with certain parts broken away of that mechanism;

Fig. 7 is a plan view of a part of the corrugating mechanism on a larger scale;

Fig. 8 is a view at right angles to`Fig. 7 on the line 8 0;

Fig. 9 is a sectional View on the Fig. 7;

Fig. 1 0 is an enlarged detail corresponding to Fig. 8;

Fig, 11 is a side view of the tensioning mechanism for the cord;

Fig. 12 is a schematic view indicating one way by which the corrugating and drive cord'may be wound;

Fig. 13 is a view of the squeezer rolls;

Fig. 14 is a plan view of the product resulting from the machine; and

line 9-9 of Fig. 15 is a cross sectional View along the line I5|5 of Fig. 14. Y

Theinvention has to do with the production of the paper product indicated at 200 in Figs. 14 and 15. 'I'his paper is made of -a paper stock suitable for the particular purpose, as for example of the paper stock used for the lining of large sugar bags and the like. The paper when finished for use comprises the crinkles 20| -formed in one direction, as for example laterally ofthe paper Stock strip worked upon and the overlapping or Vfolded over parts 202 formed at an angle to the crinkling or,'as indicated in the drawings,substan tially at right angles thereto, as for example longitudinally of the paper stock strips. The paper thus formed iswstr'etchable in one direction, as for example longitudinally by the give due to the crinkles 20|, while at the same time it is stretchable at right angles thereto to a considerably greater extent by reason of the pronounced folds 202 formed longitudinally of the paper. The longitudinal folds are formed in opposed pairs as indicated. The following is a description of the method and apparatus for forming this paper:

Referring to Fig. 1 of the drawings the invention is illustrated as embodied in a machine comprising a crinkling mechanism A, a second treating mechanism B and a drying mechanism C. 'I'he crinkling mechanism A may be of any suitable or standard form comprising, for example, a framework indicated at I 00, a tank |0| with a perforated drum |02 immersed therein over which the paper stock indicated at |03 runs and is moistened thereby, a tank |04 in which runs the crinkling roller |05 and a doctor blade |06. The paper stock |03 after it is crinkled is conveyed by a. belt conveyor v|0`| either directly to a belt conveyor |08 leading to the drying mechanism C, or directly to a conveyor mechanism indicated generally at |09 leading to the mechanism B, and then ultimately to the conveyor |08. At I0 is indicatod diagrammatically a means for printing or stamping a trade-mark upon the paper stock |03, while the paper stock is fed from a roll |03.

The mechanism B, for forming the longitudinal folds 202 and rendering the stock |03 stretchable 'at right ang1es to the crinkling effected by the mechanism A, comprises a comparatively large and elongated cylindrical drum which is closed at its ends by plates 2 and is carried by a shaft 3 which. is journaled in suitable bearings 4 mounted on the framework 5. For the purposes of supplying heating means, such as steam, to the interior 0f the drum I,- the shaft 3 is made hollow and intake and outtake pipes 6 are shown for keeping grooves are discontinued at 8, a substantial distance from the ends of the drum I to accommodate, if desired, original paper stock of a width projecting beyondl the limits 8. The paper stock I03 after the crinkling in mechanism A is fed to the periphery of the drum I and is held in close contact therewith while as a further step ,in the making of the product shown in Figs.'14

and 15 the crinkled stock is pressed into these grooves 1 by a means comprising a cord or cords II)` which at one end pass around the presser rollers II and at the other end pass around a common roller I2, there being a roller II for each groove 1, and each presser roller II having a width larger than the width of the groove 1 with which it is associated.

'I'he rollers II are lcarried by shafts I3 which are freely journaled in bearing'members I4 which in turn are mounted upon the circular disposed L-beam members I5, the bearing members I4 being secured to the beams I5 in any suitable manner, as for example by the bolts I6. The circular beams I5 are supported in any suitable manner from the framework, as for example bymeans of angle irons I1 fastened to elongated pieces I8, which in turn are fastened to the frame membersl 5. Thetwhole framework in the particular embodiment shown is suspendedby an extension I5. 'I'he rollers II are freely journaled upon the shafts I3 and cooperating with each roller` II is a sheave or guide pulley I9 for guiding the cord I9 to its particular roller II and groove 1, the sheave orguide I9 being disposed in advance of its corresponding roller and carried by the shaft n which`is immediately in advance of the shaft upon which `the corresponding presser roller is journaled." The sheaves I9 are of substantially smaller diameter than the rollers II and in the particular embodiment shown being approximately one-half the diameter of therollers. By providing the separate guide sheaves I9 in advance of the rollers, the latter v may be provided with a flat peripheral surface II', no guide groove for the cord being necessary in the presser roller, and accordingly the cords III may be pressed `down more deeply namely to the bottom of the grooves 1 to form more pronounced corrugations. Another advantage in the particular embodiment shown is that the guide sheaves cause the cord I0 to approach the bottom of the groove 1 at most a small angle indicated at 28, the cord gradually engaging the stock |93 as indicated at 2| to gradually press the same into the groove so as to avoid undue stress or strain upon the paper stock and to faciliate the formation of the deep corrugations (Fig. 9). The rollers Il are slightly spaced from the periphery of the drum and spaced at a greater distance than the depth or thickness of the sheaves and the cords to perform the step of approximately thirty-six inches in diameter.

grooving the paper stock in a particularly 'advantageous manner. The presser rollers I I and the guide sheaves I9 are arranged in the form of a V, as more particularly indicated in Figs. 6 and 7, the apex of the V being in advance withfrespect to the relative travel of the paper stock, the purpose of this beingv to progressively initiate the grooves in the paper stock from the center outwards in both directions. There are, therefore, two diverging lines of guide sheaves and presser rollers on the periphery of the drum, which lines upon a plane development would be venience, therefore, the drum I is' provided with an odd number of grooves, as for example in the particular embodiment shown there being eightyseven (87) of these grooves, covering a length of the drum of forty-five inches Where the drum is A single guide sheave in the form of a roller l23 with a groove 24 cooperates with the centrally disposed presser roller I I' which forms the groove 1' in the center (Figs. 7 and 10), while for forming the two grooves next to the center groove a pair of sheaves 25 and 25' cooperating with the following pair of presser rollers are provided, and then a second pair of guide sheaves 26, 26' cooperates with the next succeeding pair of presser straight lines, as indicated in Fig. 7. For ,con-

rollers and so on. The pairs of sheaves 25, 25',

26, 26', 21, 21 etc. are fixed to their respective shafts I3 to rotate therewith, while the presser rollers, as described above, freely rotate upon eries overlapping, as indicated at 89, 8| and in part by collars 82 which are ilxed to certain of` a the shafts I3 on the inner sides of -these rollers,

and also in part by collars 83 which are flxednto the ends of certain of the shafts I3 and engaging the beam members. I4.

Referring particularly to Figs. 8,and 10 the inner groove 1 is formed with a rounded edge or shoulder 84 over which the paper stock |93 can easily slide and work in' when pressed into the groove by the cord, namely without abrading.

tearing or otherwise impairing the paperstock; the presser rollers, as above described, being sllghtly'spaced from the periphery of the drum and the paper stock to permit the lateral free feeding movement of the stock. In a similar manner and fora similar purpose the outer wall 85 of each succeeding groove from the center is provided with a pronounced rounded shoulder or edge 88', rthe inner wall 86 of each such succeeding groove from the centerl groove being preferably slightly rounded, as indicated at 81, the rounding 88 being much more pronounced than the rounded edge 81 since the feeding movement of the paper is mostly inwardly towards the center groove 1 land the same vdegree of bevel on the inner walls not being necessary as is desired on the outer walls.

The roller 23 in addition to its function as a guide sheave 28 for a cord functions also as a smooth guide for the paper stock as it is delivered to the drum from the conveyor |09 hereafter described, it being observed in Fig. 5 that the crinkled paper stock is fed tothe drum I at a .point beneath the same and between the roller 23 and the drum, the roller 23 being closely disposed to the drum periphery.

As above described, the cords pass around at one end the individual guide sheaves I9 and their corresponding 4presser rollers in pairs and at the other end around a common roller I2. The roller I2 is illustrated as being without guide grooves for the cords but such grooves may be provided, if desired or necessary. In the particular embodiment shown the cords I8 are formed of loops of a single cord which is threaded aboutthe sheaves and presser rollers and the common `roller I2 instead of the provision of a multiplicity of separate cords for each pair or groupl of sheaves and presser rollers and the drive mechanism. This single cord arrangement is preferred among other reasons because of the ease of drive and the facility with which the tension on the cords or cord loops or equivalent may be uniformly maintained and in a comparatively simple manner. As above described the drum I is freely journaled in the frame and it is driven by the friction of the cord loops and moving paper stock thereupon. The whole is driven by means of a drive drum 88 the latter being mounted upon a shaft 89 which is journaled in the frame members,5 and driven by a sprocket 98, as more particularly hereinafter described. A sufficient number of the loops of the single cord I8 are carried around the drive drum 88 to positively drive the cord and the mechanism therewith without slippage between the cord and the drum 88 and in the particular embodiment shown the cord is looped around the drum 88 eighty-six times (86) as it is threaded back and forth between the various sheaves and presser rollers and the common guide roller. For facilitating the threading of the cord a series of idler rollers 9|, 92, 93, 94, 95, 96, 91 and 98 are journaled in the framework and spaced from and about the drum I50'in the manner generally indicated in Fig. 5, these idlers guiding the cord or cord loops to the sheaves and presser rollers in a substantially radial direction. There are .also provided two guide pulleys 99 which are carried by suitable brackets 99 up above the drum for guiding the cord to and from a tension maintaining mechanism |58, the latter comprising a multiplicity of weighted pulley-blocks |I, in the particular embodiment shown there being three of such weighted pulleys which are guided on suitable guides |52. AA cord is guided by the pulleys 99 to and from stationary pulleys |53 of the tensioning mechanism |50, While other stationary pulleys |54 are disposed between the movable weighted pulleys I5I. By means of this tensioning mechanism the exact tension desired upon the cord may be maintained, as for example by mounting different weights |55 upon the movable pulleys, and the slackof the cord is at all times taken up. The cord or belting may be of cotton, such as sash cord, or other soft and pliable material.

The cord may be threaded in any suitable manner, but in the particular embodiment shown it is threaded generally as follows:

Taking the cord, for example, as it leaves the left hand pulley 99 in Fig. 5, it passes over the guide rollers 93, 92, 9| and then radially inwardly to the guide sheave 24. From there it passes under the following presser roller II into the central groove 1 and then around the drum I to the common roller I2. From here it passes about the driving drum 88, under idler 98, over idlers 91, 95, 93, 92 and 9| and into the sheave 25', then again around the drum I to the roller I2 and about the same circuit back to sheave 26', and so on to sheave 28'. The nextvsix loops follow in the same general direction and pass around a flat sheet to form the folds 292.

the drive drum 88 and guide rollers 98, 91, 95, 93 and 92 omitting the ro'ller 9|, while the next seven loops pass around the same circuit omitting both rollers 9| and 92. The next four loops pass around the drive roller 88 and idlers 98, 91, 95 and 94 and then radially into the corresponding sheaves; while the next eight loops pass around the drive roller 88 and idlers 98, 91, and

95 radially inwardly to the corresponding sheaves; the next four loops pass around the drive roller 88, the idlers 98, 91 and 96 and then radially inwardly; while the next four loops pass around the drive roller 88, idlers 98 and 91 and then radially inwardly to the corresponding guide sheaves; while the next six loops pass radially inwardly directly from the idler 98 to the corresponding sheaves 82 to 61 respectively. These various loops leading radiallyI inwardly to the prime number sheaves are not shown in the sectional view of Fig. 5,' but are indicated schematically in Fig. l2. The loop leaving the sheave 61' and passing eventually over roller I2 instead of leading to drum or roller 88 it leads to a guide pulley |88 and from thence to another guide pulley IGI and from there radially inwardly to a sheave 61. This loop then continues about the drum over roller I2 and all the remainder of the loops pass around the driving drum or roller 88, the rst five going directly from idler 98 to the corresponding sheaves; the next four passing radially inwardly from idler 91, the next four from 96; the next eight from 95; the next four from 94; the next seven from 93; the next six from 92 and the remaining four over idler 9|, the last loop leaving 9| going to sheave 25 thence around the drum to roller I2 and from the roller I2 over roller 88, idler 98, 91 and to the right hand take-olf pulley 99 of Fig. 5.

It is clear from the above description that in the formation of the groove in the paper stock in4 t-he central groove 1' the cord I8 is in actual contact with the paper inside the groove for practically the whole circumference of the drum, namely from the first presser roller I I' (Fig. 5) all the way around to the common guide roller I2 and in the formation of thegrooves in the paper stock from the center outwards in both directions, the length of the cord in actual contact with the paper in the grooves gradually diminishes until We reach the last two presser rollers II" (Fig. 5) when the length of cord in actual contact with the paper in the outside grooves is from a point some distance rearwardly of the roller I2 to slightly beyond the presser rollers II.

The next step in the process after the formation of the deep longitudinal grooves in the paper stock by means of the mechanism abo-ve described isl the pressing of the paper stock into by means-of a pair of presser or squeezer rollers I and I1 I, the former preferably being of metal and the latter preferably being rubber covered with a thick surface of rubber |12. These drums or rollers are mounted upon shafts |13, |14 journaled in bearings |13 and |14' which bearings are carried by the frame members |15, Which frame mebers are mounted upon the framework 5.v The bearing blocks |13' are fixed, While the bearing blocks |14 are movably guided in the lguides and springs |16 are disposed between the bearing blocks |13 and |14 at either end of the shafts which tend to separate the blocks. The movement of the blocks |14' away from the blocks |13 is limited by adjustable set screws |11 and by adjusting these screws the amount of This is effected between may be adjusted. The purpose of the cated of a width approac springs |16 is to facilitate separating the drums when the paper is being threaded through, fthe adjusting screw |11 being then screwed outwardly, The shaftV |13 is driven irf a manner hereinafter set forth and the paper stock 03, as it comes from the drum I, that is over the guide roll i2, passes substantially vertically downwardly between these attening rolls-|10 and |1| and eventually falls upon the conveyor |08 (Fig. 1) which conveys the stock to the drying mechanism C. The drier C may be of any suitable type and will be more particularly referred to hereinafter,

The paper stock when passing through 'the mechanism B is formed with the deep closely disposedlongitudinal corrugations as indicated in Figs. 8 and 9, and upon passing between the flattening rollers |10 and |1| the corrugations are ironed and pressed out to. form a substantially fiat sheet with the longitudinal welldened opposed folds 202 which give the paper the substantial and marked lateral stretchability, without injury or impairing the stock. The folds formed in the paper together with the treatment in passing through the machine is usually sufficient to reduce the width to two-thirds of the original width vof the stock |03 prior to its entry into'the mechanism B.

The conveyor |03 which transfers the paper stock from the crinkling mechanism A to the mechanism B is of' the belt conveyor type, as will be described, and may be of any suitable width but in the particular emb ent shown is indidrum |4 (Fig. 6).

The whole machine is driven by aemotor which is suitably positioned with respect to the three elements A, B and C to be driven. It is coupled up to drive-a shaft ||2 by a sprocket chain I3 passing around suitable sprockets on the two shafts.

venience in illustration. 'Ihe shaft ||2 directly drives a. shaft ||4 through a sprocket chain ||5 1 v passing over suitable sprockets carried by these two shafts. 'I'he shaft ||4 is coupled to a shaft f I I6 through a small sprocket ||1, a chain ||8 and a larger sprocket I I3 on the shaft I I6. The shaft ||6 in turn drives the conveyor mechanism |20 of the drier C through a sprocket chainl |2| passing over two lower sprockets |22, a small sprocket on the drive shaft I I6 with one of the loops of the chain I2 I' passing between the alternating sprockets |23 of the drier conveying mechanism. It also drives the belt conveyor |01 and |08 through a sprocket |24 which guides the sprocket chain |2| downwardly to the sprocketsl |23 and a sprocket |26 being mounted upon a shaft around which the conveyor |08 passes at its lower end; On the shaft |25 is mounted a sprocket |26 which is coupled to a smaller sprocket |21 on the shaft around which the upper end of the conveyor |01 passes, thereby driving the continuous conveyor |01. Shaft .144, as will hereinafter appear, is coupled up to drive conveyor |03 and the mechanism B.

'I'he conveyor |03 comprises two mating or complementary conveyors mounted on a suitable framework |30 and comprises a continuous conveyor |3| onfone side of the stock |03 and a corguided over idling rollers, as indicated more parg the length of the 'I'he drive between the shaft ||2 and the crinkling roller |05 is .omitted for conf ticularly in Fig. 5, a fixed idler |33 adjacent the lowerA end of theframe |30, a set of three xed idlers |34, |35 and |36, a set of three adjustable idlers |31, |33 and |38, a set of'xed idlers |40, |4| and |42 still further up on the frame member |30, a pair of driven rollers |43 and |44 journaled upon the upper end of the frame |30 and a normally fixed idler |45'carried by an adjustable bracket |46 from the lower end of the frame |30. The bracket I46 projects down to a point in proximity to the upper end of the conveyor |01 with the idler |45 so as to enable the'conveyor |3| which is inclined at that point to receive the crinkled stock |03, and guide it up to the idler |33 about which the' lower end of the conveyor |32 passes. The vtwo adjacent loops o^f the conveyors |3| and |32.pass to the right of idler |35, to the left of idler |38 and to the right of'idler |4| and-then between the two drive rollers |43 and |44, it being noted that these idler rollers |35, |38 and |4| are out of alignment with each other to cause a slightly tortuous passage for the conveyance of the stockA |03 between the two conveyor elements. A particular advantageof the offsetting of the rolls for the conveyors |3| and 1 |32 is to cause the conveyor elements to follow a path which is rectilinear only between adjacent guide rollers, so that the inside bands of the conveyors |3| and |32 snugly and rmly engage the paper on both sides and therebyfacilitate' the i conveyance of the paper stock and avoid slippage. I'he idlers |31, |38v and |33 are carriedby an adjustable bar'l41 slidable in a guide frame |48 and adjustable'back and forth by means of an adjustable screw |43 passing through one end of i the frame |48 and' engaging the slide bar |41.

The shaft ||4 is driven from the motor as described above and from this shaft the driven drum 88 and the squeezer rolls |10 and |1| and conveyors |3| and |32-are driven. Mounted adl jacent the shaft ||4 is another shaft |60, thisl shaft also being journaled in the frame members 5. These two shafts are geared together by the gears |8| and |82, the gear |82 being keyed to the shaft and the gear |8I being loose upon 4 the shaft ||4 but capable` of being clutched thereto by means of a manually operated clutch |83 through a handle' |83'. The shaft |80 is geared to the shaft carrying the drum 88 through a sprocket chain drive |14, thereby effecting the 5 drive of the cord, the sheaves,y presser rollers and drum together with the feeding of the paper stock through that part of the mechanism. The shaft |80 is also geared to the shaft |13 through a sprocket chain drive and thereby 5 driving the shaft |13 and the shaft |13 is geared to the shaft |14 through the meshing gears of equal diameter |86. The squeezing rolis |10 and |1| are thereby driven to `atten the paper stock out and to form the folds 202 therein as above 64 described and to feed the paper stock to the conveyor |08 leading to the drier C. 'I'he conveyors |3| and |32 are driven from the shaft- |14 by means of a sprocket chain drive |43 between the shaft |14 and the shaft |43, the lat- 0g are single belts |3|', which are wider than `|3|' 7;

and |32 to give a more positive drive.

As above described,ftherefore, the motor |I| drives all of the cooperating mehanism of the Y machine for the production of the product illustrated in Figs. 14 and 15. e

The bracket |46 is adjustable to the dotted positions indicated in Figs. 4 and 5 to permit, if desired, the delivery of the crinkled stock |03 direct from the conveyor |01 to the conveyor |08 leading to the drier C. This enables the production of a paper which is merely crinkled for stretchability in one direction only in which case the manually operated clutch |83 is disenga-ged to stop the rotation of the shaft |80. This bracket |45 may be, of course, adjusted and held in any position' by any suitable mechanism but the means shown diagrammatically for this in the particular embodiment shown comprises a pin |90 in each arm |46 which pin when the arm is in its lower position engages holes |9| and when it is raised to the position shown in Figs., 4 and these pins engage holes |92 and the frame An important feature of my improved machine as above described is that the crinkled paper is conveyedV in moist and heated condition from the crinkling cylinder through the corrugating and flattening devices, and this is accomplished without materially stretching the crinkled paper longitudinally and without danger of lrupturlng or otherwise weakening the bers of the paper. The mated conveyors |3| and |32 bodily carry the paper from near the crinkling cylinder toI a position in proximity to the corrugating cylinder, and the cord or belting cooperates with the groovedy corrugating cylinder tobodily carry the paper to a position in proximity to the flattening rolls. Only sufficient longitudinal tension is placed on the paper as it passes between th'ese devices to take up slack soV as to prevent wrinkling. As the crinkl'ed paper leaves the mated conveyors |3| and |32 it is gradually guided toward the bottom of the grooves in the cylinders by the inclined portions of the belting which extend from the rforward sheaves to the presser rolls and the presser rolls acting through the belting firmly mold and lay the paper into the grooves, the soft and pliable belting exerting a cushioning action on the paper asit is pressed into the grooves. The portions of the belting extending into the grooves firmly but yieldingly hold the paper therein as adjacent corrugations are being formed so that there is no danger of the paper working out of the grooves. As the paper passes about the cylinder the heat of the cylinder not only tends to dry the paper but also prevents the wax, in the case of wax coated paper, from becoming set previously to the flattening operation.

under sufficient tension to insure the proper holding of the paper in the grooves in the corrugating cylinder, and to insure uniform driving of the cylinder without danger of slippage occurring.

As will be evident to those skilled in the art, my invention permits various modifications without departing from the spirit thereof or the scope of the appended claims.

I claim;

1. In a paper working machine a movable paper gripping surface with a multiplicity of longitudinal grooves formed therein, a plurality of sheaves journaled in close proximity to said movable -gripping surface, cords or gripping bands carried by said sheaves and maintained respectively in saidgrooves, meansifor supplying paper stock between said sheaves and the movable surface to be engaged between said cords and said movable surface and meansA for driving said drum `caused to frictionally engage.

The single length of belting for the several grooves may be maintained onlyand sheaves to progressively convey the paper stock between the cords and movable surface to cords being formed of a continuous cord,` means for distributing the loops of the cord to and from the respective sheaves, and a single means for maintaining the desired tension on said cord.

-2. In a machine of the character set forth in claim 1 wherein the cords are formed of a continuous cord with means for distributing the loops of the cord to and from the respective sheaves, and a single means for maintaining the desired tension on said crd, comprising a movable weighted pulley block inserted in one of said cord loops.

3. In a machine of the character set forth in claim 1 wherein the cords are formed of loops of a single continuous cord, together with means for distributing the cord loops to and from the sheaves and driving the same, comprising a drive drum about which the cord loops pass and are 4. A machine of the character set forth claim l -wherein the supply means comprise a pair of juxtaposed continuous conveyor belts gripping said paper stock therebetween, said belts being guided in a zigzag path for the purpose set forth.

5. A machine of the character set forth in claim 1 wherein the sheaves arey progressively distributed along the movable surface with a sinl form longitudinal corrugations in the stock, said I gle sheave for an intermediate groove followed by pairs of sheaves progressively laterally spaced the distance of thegroove spacing, the two side walls of said intermediate groove being beveled or rounded off to permit the free lateral feeding movement of the paper stock and each succeeding groove having its outer lside wall similarly beveled off.

6. A machine of the character set forth in claim 1 wherein the sheaves are progressively distributed along the movable surface with a'single y sheave for an intermediate groove followed by pairs of sheaves progressively laterally spaced the distance of the groove spacing, the two side walls of said intermediate groove being beveled or rounded off to permit the free lateral feeding movement of the paper stock and each succeeding groove having its outer side wall similarly beveled off, while its inner side wall is only slightly beveled or rounded.

7. In a paper working machinea rotatable drum having a multiplicity of circular grooves formed in its periphery, a multiplicity of sheaves journaled in close proximity to said grooves and carrying cords which are caused to traverse and grippingly engage the bottoms of said grooves, means for feeding paper stock between the sheaves and cords and the drum and means for rotating said drum with the cords engaging the paper stock and pressing it into the grooves while journaled in close proximity to said grooves and carrying cords which are caused to traverse and grippingly engage `the bottoms of said grooves. means for feeding paper stock between the sheaves and cords and the drum and means for rotating said drum with the cords engaging the paper stock and pressing it into the grooves while it is thus being advanced, an intermediate sheave cooperating with an intermediate groove with pairs of sheaves following the first sheave and progressively distributed to successive grooves whereby the corrugations are progressively formed in the advancing paper stock from the center outwardly, with the first sheave formed in a guide roll for guiding the paper stock between the cords and the drum, and means for pressing and flatteningy out the corrugations thus formed in said paper stock.

9. In-a paper working machine a rotatable drum havinga multiplicity of circular grooves formed in its periphery, a multiplicity of sheaves Journaled in close proximity to said grooves and carrying cords which are caused to traverse and grippingly engage the bottoms of said'grooves, means for feeding paper stock between the 4sheaves and cords and the drum and means for rotating said drum with the cords engaging the paper stock and pressing it into the grooves while it is thus being advanced, means for supplying a heating fluid to the interior of the drum, and means for pressing and attening out the corrugations thus formed in said paper stock.

10. In a paper working machine, a rotatable drum having a multiplicity of closely disposed 4 circular grooves formed on the periphery thereof, a plurality of sheaves one for each groove journaled in close proximity to the periphery of the drum, said sheaves after the first and centrally disposed sheave being distributed in pairs circumferentiallyabout the drum at distances progressively radiating from the center of thedrum, a common sheave also journaled in close proximity to the periphery of the drum, with cord loops guided by the individual sheaves and the 'common sheave and maintained in gripping en a gagement with the bottoms .of the grooves, a driving drum about which said cord loops pass, said 1 loops being formed of a continuous cord which are radially distributed to the sheaves by idlers distributed about the drums, a tension mechanism comprising weighted pulleys about which one loop of said cord passes, the rst or centrally disposed 1 sheave comprising afeed roll journaled in close proximity to the periphery of the drum, and means for supplying a paper strip between said roll and drum to be engaged between said-cord loops and said drumand means for driving said 2| drive drum. y v

11. In a machine of the character set forth in claim l0 comprising a plurality of non-grooved presser rollers journaled in close proximity to the periphery of` the drum and engaging the cord 2:

loops to press them into the grooves but not en.- gaging the paper stock, there being a presser roller immediately following each of said sheaves and the latter having their surfaces further removed from the peripheral surface of the drum 30 than the surfaces of the presser rollers.

12. In a machine of the character set forth in claim l0 comprising means for supplying a heating fluid to the interior of said drum.

DOUGLAS M. MCBEAN. 35 

